issue with regex pattern from resource file in javascript

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Hi all,
I am validating an email with the pattern like

JavaScript

var pattern = /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,6}$/;

and I am testing for a match like this...

JavaScript

if (!r.test(txtEmail.Text))

it works fine...
but if I get this pattern value from resource file like

JavaScript

var pattern= "<%= Resources.abcResources.patterntText %>";

the value assigned to the variable pattern is

JavaScript

var pattern = "/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,6}$/";

as a result, the matching at

JavaScript

if (!r.test(txtEmail.Text))

fails. The error says "Object doesnot supports property or method 'test'"
so how can I remove these quotes and test for a match?

Posted 30-Apr-13 20:22pm

Naz_Firdouse

Updated 30-Apr-13 20:46pm

v2

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2 solutions

Solution 2

Another alternative syntax is

JavaScript

var pattern = new RegExp("<%= Resources.abcResources.patterntText %>");

It strongly types the variable as a RegExp. Your original code

JavaScript

var pattern= "<%= Resources.abcResources.patterntText %>";

was interpreted as a string rather than a RegExp. And using the RegExp constructor avoids the VS validation error caused by this code:

JavaScript

var pattern = <%= Resources.abcResources.patterntText %>

Posted 1-May-13 2:58am

Brian A Stephens

Updated 1-May-13 3:12am

v3

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**Zoltán Zörgő** · Accepted Answer · 2013-04-30T20:43:00

Solution 1

Well, don't add quotes at first place:

JavaScript

var pattern= <%= Resources.abcResources.patterntText %>;

The <%= %> tag is evaluated on place.

Posted 30-Apr-13 20:43pm

Zoltán Zörgő

Updated 30-Apr-13 20:45pm

v3

Comments

Naz_Firdouse 1-May-13 2:51am

yes I tried the same approach and its working fine...
It shows error at semicolon but still its working fine...
thanks

Zoltán Zörgő 1-May-13 6:21am

Check syntax. But the idea is this one.

Naz_Firdouse 1-May-13 6:38am

I am able to match the values...
if I use like this
var pattern= <%= Resources.abcResources.patterntText %>
var s = "Hello";
it shows a syntax error at var s...
but the project builds and works as per the requierment

Zoltán Zörgő 1-May-13 15:27pm

I have missed a semicolon at the end, but you missed it too:
var pattern= <%= Resources.abcResources.patterntText %>;

Naz_Firdouse 2-May-13 9:43am

No...I used in my app...
but it shows a red mark at semicolon...
and the app builds successfully...
So I have a doubt why it is showing a red mark and build succeeds???

Zoltán Zörgő 2-May-13 9:57am

Because jaavscript is not built, it will run on client only.

Naz_Firdouse 2-May-13 9:59am

k thanks